[xiph-cvs] cvs commit: vorbis-tools/oggenc resample.c

[Michael Smith]

msmith      02/06/01 20:47:27

  Modified:    oggenc   resample.c
  Log:
  Use more taps for better quality when downsampling.

Revision  Changes    Path
1.2       +3 -3      vorbis-tools/oggenc/resample.c

Index: resample.c
===================================================================
RCS file: /usr/local/cvsroot/vorbis-tools/oggenc/resample.c,v
retrieving revision 1.1
retrieving revision 1.2
diff -u -r1.1 -r1.2
--- resample.c	2002/05/30 12:14:09	1.1
+++ resample.c	2002/06/02 03:47:27	1.2
@@ -184,9 +184,9 @@
                 /* push the cutoff frequency down to the output frequency */
                 cutoff = cutoff * outfreq / infreq; 
 
-		/* compensate for the sharper roll-off requirement
-		 * (this method I found empirically, and don't understand, but it's fast) */
-		beta = beta * outfreq * outfreq / (infreq * infreq);
+        /* compensate for the sharper roll-off requirement
+         * by using a bigger hammer */
+        taps = taps * infreq/outfreq;
         }
 
         assert(taps >= (infreq + outfreq - 1) / outfreq);

<p><p><p>--- >8 ----
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